亥姆霍兹方程的任意解可以表示为Hermite-Gaussian模的组合(其振幅分布可以使用笛卡尔坐标在x和y中分离)。
对于许多应用而言,将基本激光模式TEM 00 转换为更高阶的厄米-高斯光束很有用:
相元素 | 输出强度 | 相元素 | 输出强度 | ||
TEM00 | TEM20 | ||||
TEM01 | TEM12 | ||||
TEM10 | TEM21 | ||||
TEM11 | TEM22 | ||||
TEM02 |
Each mode HGlm is denoted by two indices, l & m, which represent the number of modes in the x & y directions, respectively.
典型应用
●通讯
Communication
●科学&研究
Scientific & research
●扫描应用
Scanning applications
●STED显微镜
STED microscopy
●光镊
Optical tweezing
●光学捕获力
Optical trapping
特征
●无像差
Aberration free
●高效率
High efficiency
典型的光学装置
典型工作原理
操作原理非常简单-在初始场振幅和相位上应用傅立叶变换(FT),以获得远场所需的场(或强度)。以此方式,基本高斯光束TEM_00被转换为更高阶的埃尔米-高斯模。例如–将TEM_00转换为TEM_10:
对于相位板元素,台阶的高度定义为:
其中n是材料的折射率。
设计注意事项:
为了获得高质量的性能,激光输出应为单模(TEM 00 ,M2值<1.3。如果M2较大,则仍然可以 通过插入空间来减小M2值。过滤器在所述激光器和所述DOE透镜部件之间。
在光束路径中的所有光学元件应该是高质量的,即具有低的不规则性图中,为了不使这会降低衍射相位元件的性能introdcue WAV-前误差。
一般规格:
Materials: | Fused Silica, Sapphire, ZnSe, Plastics |
Wavelength range: | 193[nm] to 10.6[μm] |
DOE design: | Binary (2-level) |
Element size: | Few mm to 100 [mm] |
Coating (optional): | AR/AR Coating |
Custom Design: | Available |
Π相板
简介:
对于许多应用,必须使用以π相为中心的相位元素。出于成像目的,使用此元素将导致增加的焦深,并且出于粒子操纵的目的,使用此元素将导致光镊\陷印。
标准产品
Part Number | Diameter [mm] | Aperture size [mm] | Material | Description |
PE-202 | 25.4 | 23.6 | Fused Silica | Half-space π difference mode converter, TEM01 (or TEM10) |
PE-230 | 25.4 | 23.6 | Fused Silica | Quarter-space π difference mode converter, TEM11 |
PE-215 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter 4817 μm |
PE-216 | 23.6 | 9.2 | Fused Silica | Round π phase at the center, diameter 5680 μm |
PE-217 | 20 | 23.6 | Fused Silica | Round π phase at the center, diameter 6200 μm |
PE-218 | 25.4 | 18.2 | Fused Silica | Round π phase at the center, diameter 8428 μm |
PE-219 | 25.4 | 23.6 | Fused Silica | Round π phase at the center, diameter 10838 μm |
PE-220 | 25.4 | 23.6 | Fused Silica | Round π phase at the center, diameter 7224 μm |
PE-221 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter 3612 μm |
PE-222 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter4214 μm |
PE-223 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter 3000 μm |
PE-224 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter 5400 μm |
PE-225 | 25.4 | 23.6 | Fused Silica | Round π phase at the center, diameter 6384 μm |
PE-226 | 12.5 | 10.7 | Fused Silica | Round π phase at the center, diameter 6840 μm |
PE-227 | 25.4 | 23.6 | Fused Silica | Round π phase at the center, diameter 8900 μm |
PE-228 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter 1200 μm |
PE-229 | 11 | 9.2 | Fused Silica | Round π phase at the center, diameter 1800 μm |
For a quotation of an above Part Number, please specify the wavelength used.
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